Mental worship, is one of the ways of performing meditation. And it does not need anybodyâs guidance. I personally found that this is one of the excellent ways of meditation in Bhakti (devotion) Yoga. You get so involved in this mental worship, that you will never come to know how time passes. And when you forget the time in meditation, you achieved a fantastic concentration. When there is a devotion to your God or Guru, religion does not matter. What matters is how much you are involved & engrossed in the mental worship. Person of any religion can do it. It is a worship similar to what you may do physically. But, here, it is a request to goto the utmost details while performing mental worship.